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Browsing Forest-wide Documents by Subject "Abandoned mines -- Environmental aspects -- Oregon -- Wallowa-Whitman National Forest"
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Now showing items 1-12 of 12
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(2006-08)Assesses site consisting of four collapsed adits, one of which has water discharge, and 6000-80000cy of wasterock materials, most of which is adjacent to Granite Creek. There are numerous trenches and apparent hydraulic ...
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(2006-08)Assesses site consisting of a large collapsed adit and approximately 3000cy of wasterock material adjacent to Granite Creek. A Niton XLt found that most metals at the site exceeded screening criteria for birds, invertebrates, ...
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(2006-08)Assesses mine site consisting of a large collapsed adit and approximately 1000cy of wasterock material, which is adjacent to a small ephemeral tributary to Granite Creek. A Niton XLt unit found that most metals at the site ...
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(2006-08)Assesses mine site consisting of a large collapsed adit and approximately 700cy of wasterock material adjacent to Granite Creek, with numerous trenches stemming from hydraulic mining and possible historic dredging operations. ...
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(2006-04)Assesses, through a streamlined risk assessment process, potential human health and ecological risks associated with mining-related contamination at the Monumental, Cap Martin, Sheridan, Tillicum, and Central Mines ...
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(2004-01)Documents Site Inspection performed by EA Engineering at five Granite Creek Mines: Monumental, Cap Martin, Sheridan, Tillicum, and Central. The objectives were to access the immediate or potential threat posed by wastes ...
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(2007-02-20)Documents, pursuant to the Guidelines of the National Oil and Hazardous Substance Contingency Plan (NCP), the decision to initiate a CERCLA investigation in nine locations at the Granite Creek Tributary Mines site. A Site ...
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(2007-02-20)Documents, pursuant to the guidelines of the National Oil and Hazardous Substance Contingency Plan (NCP), the decision to initiate a CERCLA investigation in nine locations at the Granite Creek Tributary Mines site. A Site ...
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(2006-08)Assesses mine site consisting of numerous trenches on the mountain slope, at least five of which are collapsed to partially collapsed adits, 9000-12,000cy of wasterock and 4000cy of tailings. A Niton XLt unit found all ...
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(2004-03)Assesses mine and mill site in moderate to steep side slopes, consisting of an open adit, waste rock dumps, tailings pond, and remains of a mill. A Niton XRF unit found numerous chemical elements exceeding regulations, ...
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(2004-03)Assesses mine and mill site on moderate to steep side slopes, with burned debris of the mill, open adit and an airshaft filled with water, with associated waste dumps. A Niton XRF unit found numerous chemical elements ...
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(2006-08)Assesses mine site on moderate side slopes, consisting of a large collapsed adit with minor seepage, approximately 500cy of wasterock near a small creek. A Niton XLt unit found that all metals exceeded screening criteria ...
Now showing items 1-12 of 12